//
// Created by victor on 18-7-6.
//

#include "apue.h"

int main() {
  int c;
  while ((c = getc(stdin)) != EOF)
    if (putc(c, stdout) == EOF)
      err_sys("output error");

  if (ferror(stdin))
    err_sys("input error");

  return 0;
}
